In space, supplying breathable air involves several methods, including using oxygen tanks, chemical reactions, and resupply missions. Oxygen is not just floating around in space for astronauts to breathe, so they must bring it with them or generate it.
Methods for Supplying Oxygen in Space
Here's a breakdown of how oxygen is provided:
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Oxygen Tanks:
- Oxygen is stored in pressurized tanks.
- This oxygen is then circulated throughout the spacecraft or space station's cabin to provide a breathable atmosphere.
- When supply ships, automated transfer vehicles, or the space shuttle dock at the ISS, oxygen is pumped into pressurized tanks.
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Chemical Reactions:
- Some systems use chemical reactions to generate oxygen.
- For example, breaking down sodium chlorate into sodium chloride and oxygen gas.
- This provides a way to create oxygen on demand.
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Resupply Missions:
- Regular resupply missions are essential for maintaining oxygen levels, especially on long-duration missions like those on the International Space Station (ISS).
- These missions deliver not only oxygen tanks but also equipment to support oxygen generation systems.
Oxygen Circulation
Once the oxygen is stored or generated, it must be circulated efficiently:
- Cabin Pressurization: The oxygen is pumped into the cabin to maintain a breathable atmosphere.
- Air Circulation Systems: Spacecraft and space stations have air circulation systems to ensure oxygen is evenly distributed and carbon dioxide is removed.
